The Bay State, the birthplace of gay marriage, is on the cusp of another revolution in alternative living that could prove to be just as controversial - gay condo communities. Developers across the country are drawing up plans for condo projects - and sometimes even whole communities - targeted at gay and lesbian buyers. And Massachusetts is proving to be a fertile laboratory for this experiment. Two planned developments on either end of the state, the Stonewall at Audubon Circle in the Fenway and Paradise One in Easthampton, are pioneering condo complexes marketed to older gay and lesbian residents. There...